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scsi: sg: allocate with __GFP_ZERO in sg_build_indirect()

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This shall help avoid copying uninitialized memory to the userspace when
calling ioctl(fd, SG_IO) with an empty command.

Reported-by: [email protected]
Cc: [email protected]
Signed-off-by: Alexander Potapenko <[email protected]>
Acked-by: Douglas Gilbert <[email protected]>
Reviewed-by: Johannes Thumshirn <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
Alexander Potapenko authored and Martin K. Petersen committed 2018-05-18 10:26:01 -04:00
1 parent a406b0a069
commit a45b599ad8
1 file changed
+1 -1
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drivers/scsi/sg.c
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@@ -1894,7 +1894,7 @@ retry:
num = (rem_sz > scatter_elem_sz_prev) ?
scatter_elem_sz_prev : rem_sz;
schp->pages[k] = alloc_pages(gfp_mask, order);
schp->pages[k] = alloc_pages(gfp_mask | __GFP_ZERO, order);
if (!schp->pages[k])
goto out;